<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Document</title>
</head>
<body>

    <form action="http://localhost/php-project/part04-session/my.php" method="post">

        <input type="text" name="username" id="">
        <button type="submit">提交</button>

    </form>
    
</body>
</html>